FEAT #11347 TIME 1:30 class and refactoring css

...ntend/app/administration/administration-routing.module.ts

...frontend/app/administration/administration.component.html

src/frontend/app/administration/administration.module.ts

...ion/group/indexing/indexing-administration.component.html

...end/app/administration/home/administration.component.html

...end/app/administration/home/administration.component.scss

...ntend/app/administration/home/administration.component.ts

src/frontend/css/engine_2.scss

src/frontend/css/maarch-material.css

src/frontend/css/maarch-material.scss